Unicel C-7330 Spa Filter Cartridge30 Sq Ft (Open Top & Bottom, 7″ OD x 7-1/4″ Length)
The Unicel C-7330 is a replacement 30 sq ft pleated spa filter cartridge designed for select hot tub and spa filtration systems that use a short, wide cartridge with open ends. It captures fine debris to help keep water clear and supports strong flow when cleaned regularly.
Key Features
30 sq ft filtration area for effective debris capture and steady circulation
Open top & open bottom design for compatible standpipe/canister setups
Durable pleated media and rigid core built for repeated cleanings
Common replacement when the original cartridge is torn, flattened, or wont clean up well
Specifications
Part Number: C-7330
Filtration Area: 30 sq ft
Outside Diameter: 7″
Length: 7-1/4″
Top End Cap: Open
Top Inside Diameter: 4-1/8″ (open with step)
Bottom End Cap: Open
Bottom Inside Diameter: 4-1/8″ (open with step)
Pleat Count (typical): 265
Replaces / Cross References
Pleatco: PMA30-2002-R
Filbur: FC-1003
Common Application Reference: Master Spas EP-Cylinder / 30 sq ft cylinder (older style) (verify by measurements)
When to Replace
Pleats are torn, frayed, or separating from end caps
Cartridge stays restrictive or pressure/flow issues continue after thorough cleaning
End caps are cracked/warped or the core is collapsing
Water stays dull/cloudy despite balanced chemistry and routine maintenance
Related Products
Spa Cartridge Filter Cleaner
Cartridge Cleaning Wands
Spa Water Test Strips
Fine Debris Pre-Filters (Skimmer Socks / Filter Bags)
Spa Scale Remover (for calcium buildup)
Maintenance Tips
Rinse the cartridge on a regular schedule (often weekly for heavy use) to prevent restriction and keep jets flowing strong.
Deep clean every 36 weeks (or as needed) with a cartridge cleaner to remove oils and fine debris; rinse thoroughly before reinstalling.
If scale is present, degrease first, then use a scale remover; rinse completely before returning the filter to service.
Consider rotating between two cartridges (one in use, one drying after cleaning) to extend service life and improve performance.
